1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
cricket20 [7]
3 years ago
15

Which of these describes an endothermic process?

Chemistry
2 answers:
oksian1 [2.3K]3 years ago
5 0

Answer:

Put up the answer choices

Explanation:

endothermic means absorbing heat

viva [34]3 years ago
5 0

The options is as follows:

a. When lithium is placed in water, the temperature of the container increases.

b. The combustion of kerosene releases heat.

c.  When barium hydroxide is mixed with ammonium chloride, ice crystals form on the outside of the container.

d. The reaction of trinitrotoluene with oxygen releases heat and light.

Answer:

c.  When barium hydroxide is mixed with ammonium chloride, ice crystals form on the outside of the container.

Explanation:

An endothermic reaction is a chemical reaction whereby heat or energy is absorb from the environment. The heat absorb from the environment is used to provide the activation energy needed for the reaction to be carried out. This energy can be absorbed in the form of heat, light and electricity.

In endothermic reaction their is an overall decrease in the temperature as heat is usually absorb from the surrounding . Usually, after the reaction the components feel cold. Examples of endothermic reaction is dissolving salt in water. Other example of endothermic process are cooking an egg and evaporating liquid water.

Note not all endothermic process are chemical reaction because chemical reaction usually involve breaking or formation of chemical bond. Example of endothermic process that are not chemical  reaction is sweating.

All the other process, their is a release of heat to the surrounding except When barium hydroxide is mixed with ammonium chloride, ice crystals form on the outside of the container.

You might be interested in
A155-g sample of a unknown substance was heated from 25.0°C to 40.0°C.In the process, the substance absorbed 5696 J of energy. W
Iteru [2.4K]
The answer is: (5696 J) / (155 g) / (40.0 - 25.0)°C = 2.45 J/g·°C 
3 0
3 years ago
How to calculate average mass in grams?
Dafna1 [17]

Explanation:

hope these help you answer

7 0
3 years ago
Types of isomers possible for ch3 ch2 ch2 ch3
puteri [66]

Answer:

It has two isomers; n-butane and isobutane. Here n-butane is a straight-chain compound with four carbon atoms bonded with single covalent bonds. Explanation: Butane is an alkane with four carbon atoms so molecular formula is C4H10.

Explanation:

4 0
2 years ago
An unsaturated solution is formed when 80 grams of a salt is dissolved in 100 grams of water at 40. This salt could be ?
LekaFEV [45]
A simple way to go about this is that we look at the solubility curve, on the x axis we first look at the temperature and then the corresponding value of solute/100g H2O on the y axis, from the 4 curves above only NaNO3 has a curve that can accommodate  80g of salt at 40 without being Saturated since at 40 degrees it can accommodate 105g of salt to become completely Saturated.
7 0
3 years ago
Read 2 more answers
How many sig figs are in 0.0003422
Ivenika [448]

Answer:

4

Explanation:

The zeros before a non zero digit do not count as significant figures so there are 4 sig figs in the number

5 0
3 years ago
Other questions:
  • Magnesium ions carry a 2+ charge and chloride ions carry a 1- charge. what is the chemical formula for the ionic compound magnes
    5·1 answer
  • An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this element?
    9·1 answer
  • The resilient substance that keeps bone ends from crushing when compressed is
    14·1 answer
  • How does a full octet affect trends among the noble gases?
    7·2 answers
  • How many molecules are there in 79g of Fe2O3? how many atoms is this?
    12·1 answer
  • What is te name of P2CL7
    14·1 answer
  • Sandpaper is a type of rough material that is rubbed on other surfaces to make them smoother. Ms. Fonger is rubbing a piece of s
    10·1 answer
  • Which two changes would make this reaction product-favored? 3H2 + N2 ⇄ 2NH3 + energy  A. Decreasing the pressure  B. Increasin
    11·2 answers
  • The a ______ planet is from the sun, the _______ it takes the planet to revolve around the sun. Making the "year" for that plane
    10·1 answer
  • What is gravitational energy? Please help.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!